Initial commit:

PhysX 3.4.0 Update @ 21294896
APEX 1.4.0 Update @ 21275617

[CL 21300167]

1 files changed, 133 insertions, 0 deletions

diff --git a/APEX_1.4/common/include/ApexRand.h b/APEX_1.4/common/include/ApexRand.h
new file mode 100644
index 00000000..1c075f7e
--- /dev/null
+++ b/APEX_1.4/common/include/ApexRand.h
@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) 2008-2015, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * NVIDIA CORPORATION and its licensors retain all intellectual property
+ * and proprietary rights in and to this software, related documentation
+ * and any modifications thereto.  Any use, reproduction, disclosure or
+ * distribution of this software and related documentation without an express
+ * license agreement from NVIDIA CORPORATION is strictly prohibited.
+ */
+
+
+#ifndef APEX_RAND_H
+#define APEX_RAND_H
+
+#include "PxMath.h"
+#include "PxVec3.h"
+#include "ApexUsingNamespace.h"
+
+namespace nvidia
+{
+namespace apex
+{
+
+// "Quick and Dirty Symmetric Random number generator"	- returns a uniform deviate in [-1.0,1.0)
+class QDSRand
+{
+	uint32_t mSeed;
+
+public:
+
+	PX_CUDA_CALLABLE PX_INLINE QDSRand(uint32_t seed = 0) : mSeed(seed) {}
+
+	PX_CUDA_CALLABLE PX_INLINE void setSeed(uint32_t seed = 0)
+	{
+		mSeed = seed;
+	}
+
+	PX_CUDA_CALLABLE PX_INLINE uint32_t seed() const
+	{
+		return mSeed;
+	}
+
+	PX_CUDA_CALLABLE PX_INLINE uint32_t nextSeed()
+	{
+		mSeed = mSeed * 1664525L + 1013904223L;
+		return mSeed;
+	}
+
+	PX_CUDA_CALLABLE PX_INLINE float getNext()
+	{
+		union U32F32
+		{
+			uint32_t   u;
+			float   f;
+		} r;
+		r.u = 0x40000000 | (nextSeed() >> 9);
+		return r.f - 3.0f;
+	}
+
+	PX_CUDA_CALLABLE PX_INLINE float getScaled(const float min, const float max)
+	{
+		const float scale = (max - min) / 2.0f;
+		return ((getNext() + 1.0f) * scale) + min;
+	}
+
+	PX_CUDA_CALLABLE PX_INLINE PxVec3 getScaled(const PxVec3& min, const PxVec3& max)
+	{
+		return PxVec3(getScaled(min.x, max.x), getScaled(min.y, max.y), getScaled(min.z, max.z));
+	}
+
+	PX_CUDA_CALLABLE PX_INLINE float getUnit()
+	{
+		union U32F32
+		{
+			uint32_t   u;
+			float   f;
+		} r;
+		r.u = 0x3F800000 | (nextSeed() >> 9);
+		return r.f - 1.0f;
+	}
+
+};
+
+// "Quick and Dirty Normal Random number generator"	- returns normally-distributed values
+class QDNormRand
+{
+	QDSRand mBase;
+
+public:
+
+	PX_CUDA_CALLABLE PX_INLINE QDNormRand(uint32_t seed = 0) : mBase(seed) {}
+
+	PX_CUDA_CALLABLE PX_INLINE void setSeed(uint32_t seed = 0)
+	{
+		mBase.setSeed(seed);
+	}
+
+	PX_CUDA_CALLABLE PX_INLINE uint32_t setSeed() const
+	{
+		return mBase.seed();
+	}
+
+	PX_CUDA_CALLABLE PX_INLINE uint32_t nextSeed()
+	{
+		return mBase.nextSeed();
+	}
+
+	PX_CUDA_CALLABLE PX_INLINE float getNext()
+	{
+		//Using Box-Muller transform (see http://en.wikipedia.org/wiki/Box_Muller_transform)
+
+		float u, v, s;
+		do
+		{
+			u = mBase.getNext();
+			v = mBase.getNext();
+			s = u * u + v * v;
+		}
+		while (s >= 1.0);
+
+		return u * PxSqrt(-2.0f * PxLog(s) / s);
+	}
+
+	PX_CUDA_CALLABLE PX_INLINE float getScaled(const float m, const float s)
+	{
+		return m + s * getNext();
+	}
+};
+
+}
+} // end namespace nvidia::apex
+
+#endif